SPM Synchronous Motor Protection & Control

The SPM controls starting, synchronizing, and protection of collector-ring or brushless type synchronous motors.

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Applications

Collector-ring synchronous motors

Protection and Control

Field application

PF regulation maximizes efficiency

Reluctance torque synchronizing

Re-synchronizing

DC field current loss

Ground fault - trip and alarm

DC field voltage check

Incomplete sequence

Field winding overtemperature

Power factor (pull-out)

Stall/acceleration

Restart lockout